Internal-combustion engine.



UNITED 'STATES PATENT OFFICE.

JOHN S. BARNES. F DETROIT, MICHIGAN.

INTERNAL-abundan@ ENGIE specification or remis ramt.

Pertenece Aug .2o,j191s.

gpnengamea my za, I srr. sum1 ivo. mm.

4To all whom it may concern.'

' Be-f'it known that I, JOHN S. BARNES, a

' citizen of the United States, residin at Detroit, county of Wayne,Stateof'` ichi an, havejinvented a; certain new and useful ymprovementin Internal-Combustmn.Eng1nes,

end declare thejfollowin to be a` full, clear,

and exact description o y'the same, suchas will enable others skilled inthe art to which it pertains to make and use the same, referficencebeing had tothe accompanying drawwhichform a part of this specification.

y invention relates to internal combustion engines, assbown in theaccompan in@e drwin *and more `pinticularly ointe out in the ollowingspecification an eluims.

'One of the objects of' this invention is to l secure the eiiiciency ofa. long. stroke motor stroke.

placed upon the drawingsfr() der through the reduction of thelengtlr'fciff showing the piston as it would appear at the end of thecompression strokeand also et theendof the exhaust stroke.4

Fig.' 2 is a diagrammatic view showing the piston at the Iirst portionof the suction Fig. 3 is a diagrammatic view showing the piston at theend ofthe suction stroke.

Fig. 4 is a diagrammatic view showing'. the 'piston at the beginning ofthe compressionstroke.

Fig. 5 is n diagrammatic vi -\\`"sl1owing the pistonal' `the end of thefiringr stroke.

' Referring` now to the letters ot reference A, (leunt-es an internalrombnstion engine, l, its iilmdI-n', (l, its cranlccasc. lf), indicatesa ypiston, comprisingtwo concentric sleeves E, and l?, which' operate4in conjunction but have an incirnrendent movement `with respect to eachother. I Jlstorrrod connecting the inner sleeveF,

G', designates a ,with the crankshaft He` I, indicates aol:`

ing ringscerriedaby the sleeve E. de-

notes a divided peripheral ring carried by` the sleeve F,which'isadepted to expand as the pistonltravelsx'in ,outward directionentering etapferingrecess. e, formed in the sleeve E, and upon engagingthe shoulder e',

of the recessed portions, the sleeves are interlocked end-complete theiroutward stroke as a. single unit. It will be -'seen upon reference tothe diagra-mmaticqviews that in Ithe iir'st half of the suction stroke(see'Fig. 2) the sleeve F, moves outwardly leavin the sleeve E, at theend of the cylinder unti the expanding ring J, engages the shoulder e.,

` of the `tapering recess formed in the sleeve E.

The sleeves E and F, then complete their strokt in fixed yrelation toeach other (see Fig. 3) drawingV into the vcylinder a rela.-

tvely small charge of fuel. The fuel charge is then compressed,-thesleeve F, telescop- Aing within the outer sleeve E, (see-Fig. 4)-

the air between the ends of the respective.

sleeves passim out between the s acediends of the' expan ing ring J. Thes eeves then move together compressing thecha'rgeready for firing, asindlcated inljFig. '1, of 'the' drawingg-the explosion then takes place-driving both sleeves of the piston to the end of the cylinder, (seeFig. 5) thereby securing the 'ellic'ieneyof a. long Vstrokemotor withthe admission of only a relatively-small fuel charge. Fig. 1 also showsthe? osition ot' the sleeves of the piston' at the en of the exhauststroke which follows.

The cycle of i operations inst described is then repeated. j Having-thus described my invention,

what if claim isz-` 1. In en `internal combustion engine, a. pistonrrjnnprismg telescopmg sleeves, haw

ing a iimited independent movement for 'aportion or' each stroke. of thepiston and a- `unitary movement for the remainder of the stroke. one ofthe sleeves havingr an inclined recess, and a laterally yieldable member`carried by the other sleeve to cooperate with the inclined recess.

2. ln antmiernal` combustion englne, a piston comprising tel'escopmgsleeves hav ing :l limited independent movement for a"A portion of eachstroke of the pist-on and a unitary movement for the "emainder of thestroke., one of the sleevesJ .lering a tapering walland a shoulder etthe base of the'tepering wall and anxe'xpandingring mounted uponthe'otherfsleeve andadepted to comf i 2 1,27e,oo4

erate with the said tapering wall and ortion of the piston stroke areadapted to shoulder. I lnterlock that they may operate as a unit 3. In,rm internal combustion engine, a for the remainder of the pistonstroke. o piston .comprising two telescoping sleeves, e e In testimonywhereof, I sign this speci- 5 piston rod connecting the inner sleevewith cation in the presence of two witnesses.'

the crank shaft of the enginef and an ex- 'pending ring fitted to theinner sleeve Y JOHN s' BARNES l adapted to enter an inclined recess inthe Witnesses:

outer sleeve, whereby the sleeves while free S. E. THOMAS,

10'y to moe independently of each other fo'r a N. H. HOUSE.

